Gentlemen Prefer Blondes, the 1953 20th Century Fox movie is a musical comedy/romance directed by Howard Hawks starring Jane Russell and Marilyn Monroe, with Charles Coburn, Elliott Reid, Tommy Noonan, Taylor Holmes, and Norma Varden. trailer can be viewed here. There's no copyright notice.

This image is a screenshot made by myself from a public domain movie's trailer. Trailers for movies released before 1964 are in the Public Domain because they were never separately copyrighted.

licence : https://web.archive.org/web/20080321033709/http://www.sabucat.com/?pg=copyright Trailer can be viewed here; there's no copyright notice.

This work is in the public domain in the United States because it was published in the United States between 1931 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties. العربية ∙ беларуская (тарашкевіца) ∙ čeština ∙ Deutsch ∙ Ελληνικά ∙ English ∙ español ∙ فارسی ∙ français ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ ไทย ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−